#183E4F#183E4F

#183E4F is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.5% C 0.052 H 230.2°. Best body text is #FFFFFF at 11.41:1 contrast (WCAG AA passes).

Color values

HEX	#183E4F
RGB	rgb(24, 62, 79)
HSL	hsl(199, 53%, 20%)
HSV	hsv(199, 70%, 31%)
CMYK	cmyk(69.6%, 21.5%, 0%, 69%)
CIE-LAB	lab(24.33, -7.35, -14.30)
CIE-LCH	lch(24.33, 16.08, 242.81°)
OKLab	oklab(34.46% -0.0333 -0.04)
OKLCH	oklch(34.46% 0.052 230.2)
XYZ	xyz(3.5100, 4.2036, 8.0220)
Luminance	0.0420 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E4F #4F2918

analogous

#184F44 #183E4F #18234F

triadic

#183E4F #4F183E #3E4F18

tetradic

#183E4F #44184F #4F2918 #234F18

square

#183E4F #44184F #4F2918 #234F18

split-complementary

#183E4F #4F1823 #4F4418

monochromatic

#071217 #0A1920 #183E4F #26637E #3588AD

Accessibility & contrast

On white

11.41

#183E4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#183E4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E4F

11.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E4F	#FFFFFF	#000000	##FFFFFF
##183E4F	1.00	11.41	1.84	11.41
#FFFFFF	11.41	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#353D50

Deuteranopia (green-blind)

#2E374F

Tritanopia (blue-blind)

#004344

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183e4f;
/* rgb */ color: rgb(24, 62, 79);
/* oklch */ color: oklch(34.5% 0.052 230.2);

Tailwind

colors: {
  custom: {
    50: '#5c7380',
    500: '#183e4f',
    950: '#000000',
  },
}

SCSS

$custom: #183e4f;
$custom-light: #5c7380;
$custom-dark: #000000;

JSON

{
  "hex": "#183e4f",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 79
  },
  "hsl": {
    "h": 198.545,
    "s": 53.398,
    "l": 20.196
  },
  "oklch": {
    "l": 0.3446,
    "c": 0.05206,
    "h": 230.2
  },
  "luminance": 0.04204
}

Semantic roles & 50–950 ramp

primary

#183E4F

secondary

#86533D

accent

#784BDD

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183E4F

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →